linux-kernel - Re: [PATCH 2/4] ARM: EXYNOS: PL330 MDMA1 fix for revision 0 of Exynos4210 SOC

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Message-ID: <508EBBB6.2090006@samsung.com>
Date:	Mon, 29 Oct 2012 18:24:06 +0100
From:	Kukjin Kim <kgene.kim@...sung.com>
To:	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
CC:	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-samsung-soc@...r.kernel.org, jassisinghbrar@...il.com,
	vinod.koul@...el.com, kgene.kim@...sung.com,
	rob.herring@...xeda.com, dinguyen@...era.com, pawel.moll@....com,
	t.figa@...sung.com, kyungmin.park@...sung.com
Subject: Re: [PATCH 2/4] ARM: EXYNOS: PL330 MDMA1 fix for revision 0 of Exynos4210
 SOC

On 10/29/12 10:59, Bartlomiej Zolnierkiewicz wrote:
> Commit 8214513 ("ARM: EXYNOS: fix address for EXYNOS4 MDMA1")
> changed EXYNOS specific setup of PL330 DMA engine to use 'non-secure'
> mdma1 address instead of 'secure' one (from 0x12840000 to 0x12850000)
> to fix issue with some Exynos4212 SOCs.  Unfortunately it brakes
> PL330 setup for revision 0 of Exynos4210 SOC (mdma1 device cannot
> be found at 'non-secure' address):
>
> [    0.566245] dma-pl330 dma-pl330.2: PERIPH_ID 0x0, PCELL_ID 0x0 !
> [    0.566278] dma-pl330: probe of dma-pl330.2 failed with error -22
>
> Fix it by using 'secure' mdma1 address on Exynos4210 revision 0 SOC.
>
> Cc: Tomasz Figa<t.figa@...sung.com>
> Cc: Kukjin Kim<kgene.kim@...sung.com>
> Signed-off-by: Bartlomiej Zolnierkiewicz<b.zolnierkie@...sung.com>
> Signed-off-by: Kyungmin Park<kyungmin.park@...sung.com>
> ---
>   arch/arm/mach-exynos/dma.c              | 5 ++++-
>   arch/arm/mach-exynos/include/mach/map.h | 3 ++-
>   2 files changed, 6 insertions(+), 2 deletions(-)

[...]

> +		if (samsung_rev() == EXYNOS4210_REV_0)
> +			exynos_mdma1_device.res.start = EXYNOS4_PA_S_MDMA1;

Hi Bart,

Hmm...above change and adding definition of EXYNOS_PA_S_MDMA1 address 
can fix the problem you commented on EXYNOS4210 Rev0 without others?...

Thanks.

Best regards,
Kgene.
--
Kukjin Kim <kgene.kim@...sung.com>, Senior Engineer,
SW Solution Development Team, Samsung Electronics Co., Ltd.
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